Sand-pump.



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PATENTBD MAR. 10, 1903. A

C. M. HEETBR.

SAND PUMP.

APPLIOATION FILED DBO. 27, 1901.

No MODEL.

' UNITED STATES vPATENT FFICE.

CHARLES M. HEETER, OF BUTLER, PENNSYLVANIA.

SAN D-PUIVl P.

.SPECIFICATION forming part of Letters Patent No. 722,424, dated March 10, 1903.

Application tiled December Z', 1901. Serial No. 87,499. (No model.)

To all whom it' may concern..-

Be it known that I, CHARLES M. HEETER, of Butler, Butler county, Pennsylvania, have invented a new and useful Sand-Pump, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specitication, in which- Figure l is a side elevation, partly broken away, of the lower part of the pump, showing the detachable section about to be coupled. Fign2 is a similar view showing the parts in coupled position. Fig. 3 is a cross-section through the connecting-joint, and Fig. 4is a detail view showing a modified form of fastener.

My invention relates to the sand-pumps for bailers used in connection with deep wells, and is designed to prevent leaking between the lower detachable section and the body and to lengthen the life of such lower section.

In present constructions with the systems now used the detachable sections become injured and wear out, owing to insufficient bearing between this section and the body and to improper connections, these usually being in the form of a bayonet-joint or plain threads. My invention overcomes these difculties; and it consists in providing the parts with mutilated threads, similar to a breech-lock for guns, in combination with a lock for holding the parts in closed position, this lock being preferably arranged to bring a pressure upon the removable section, which acts to tighten the lock.

In the drawings, 2 represents the body of the pump, having alower integral portion externally reduced in diameter, this reduced portion 3 having longitudinal mutilated screw-threads 4. A shoulder 5 is thus provided at the upper end of the reduced portion. The upper end of the removable section 6 abuts against this shoulder when the parts are coupled, this section having internal mutilated screw-threads arranged to slip over and lock upon the mutilated threads of the body in the same manner as the breechlock of a gun. This removable sleeve has an inner shoulder 8 at the lower end of the coupling portion, this shoulder fitting against the lower end of the reduced portion of the body. The removable section is provided in its bottom with the usual removable shoe 9, containing the clap-valve 10.

To lock the lower sleeve in closed position on the body,I provide one or more leaf-springs ll, which are secured to the body and enter notches 12 in the top of the removable section when the parts are coupled, the intermediate part of these springs being arranged to bring a side pressure, which tends to rotate the removable section and lock it more tightly in place.

In the form of Fig. 4 I show an eccentric lock 13, which takes the place of the leafspring and by which the same action may be obtained in locking the parts in closed position. 1

The advantages of my invention result from the shoulder-bearing at the upper end of the removable section and at the lower end of the body, which prevent any wabbling and hold The parts in adjusted place. The mutilated threads afford a convenient means for quickly detaching, while at the same time they securely hold the removable section in place at several parts along the circumference.

' Many variations may be made in the form and arrangement of the parts without departing from my invention.

l. A sand-pu mp having a removable lower section surrounding the lower part of its body, a screw-threaded connection between said section and the body, and a lock device constructed and arranged to lock said section and body together and to exert a constant rotative pressure upon the screw connection; substantially as described.

2. A sand-pump having a lower removable section surrounding the lowerpart of its body, a screw-threaded connection between said section and the body, a lock device constructed and arranged to lock said section and body and to exert a constant rotative pressure upon the ,screw connections, and a removable shoe secured to the lower end of said section; substantially as described.

3. A sand-pump having a cylindrical body l upon the screw connections to prevent unportion with a lower part of reduced exterscrewing; substantially as described. 1o nal diameter, a removable tubular section In testimony whereof I have hereunto set surrounding said reduced portion, a screwmy hand. threaded connection between the section and l CHARLES M. HEETER. the body, and a look device seated in recesses i Witnesses: Y in the body and removable section and ar- GEO. B. BLEMING,

ranged to exert a constant rotative pressure L. M. REDMAN. 

